My bagless carry; wear a Magic Band old style, small wallet with ID, some cash, one CC, insurance card, then my cellphone. Sometimes I carry something in my hand, like a water bottle, or umbrella. That's it. If it is something others would like to try, it is indeed best to find clothes with pockets that either zip or button, and it's not as hard as one would think, even for women's clothes, the other option is deep pockets.
I wouldn't carry the go-pro unless there's a specific plan to use it. I also usually go back to the room at some point and just recharge my phone then (I turn on battery saver at the beginning of the day and make an effort to stay off my phone whenever humanly possible), so no charger.